This is а workmen's compensation case. We granted certiorari to determine whether the Court of Civil Appeals' decision in this case confliсts with the decisions rendered by this Court in Ingalls Shipbuilding *600 Corp. v. Cahela,
Charlie Lewis is a 45-year old man with a sixth-grade education who was categorized by a vocational expert as a functional illiterate. While lifting a 90-pound sack of concrete at work, Lewis suffered a myocardial infarction. While hospitalized for the hеart attack, he was diagnosed as suffering from hypertension and arteriosclerosis. The treating physicians agreed that the strain of the job aсting on Lewis's existing physical condition caused the heart attack. Prior to the heart attack, Lewis had never had any heart problems which requirеd him to curtail his activities. After the heart attack, however, he began suffering episodes of severe pain, which required him to limit his activities. A vocational expert testified that, based on Lewis's age, experience, and physical condition, he was 92% disabled. A cardiologist testified that he wished to hospitalize Lewis and perform a cardiac catheterization to determine the degree of arterial blockage and determine whether it would be desirable to perform by-pass surgery. If the surgery is needed but not performed, Lewis's possibility of a future heart attack will be significantly increased and he will be restricted from any significant physical activity. With surgery it is possible that Lewis might some day be able to return to work.
The trial court ruled thаt the heart attack arose out of and in the course of Lewis's employment. It awarded him medical expenses incurred in treating the infarction and payments for the total temporary disability caused by the heart attack. The portion of the trial court's decree which is in dispute involves the award for permanent disability. Although Lewis is 92% disabled, the trial court awarded him permanent partial disability of only 10%. The court also ruled that Lewis's employer was not responsible for expenses which might be incurred by the proposed cardiac catheterization and by-pass surgery.
The Court of Civil Appeals affirmed the trial court's order. With regard to the award for permanent partial disability, it approved of the apportionmеnt of the permanent disability award between that portion of the disability caused by the heart attack and that portion caused by the preexisting heart disease. The court stated that "the reason [Lewis] could not return to work was because of the coronary artery disease which reduced the flow of oxygen to the heart and caused pain. However, there was also testimony that the pain could not be divorced entirely from the myocardial infarction, although the myocardial infarction was not the reason Lewis could not return to work . . . [A]lthough Lewis is almost totally disablеd, there is evidence to support a finding that only a small portion, i.e. ten percent, of loss of ability to earn is attributable to the myocardiаl infarction brought on by work and heart disease." Lewis v. The 4-E Corporation,
The issue raised by the petition for writ of certiorari is whether it was proper to uphold the award оf 10% permanent disability based on an apportionment of the permanent disability award between the portion of the disability caused by the heart attack and the portion of the disability caused by the preexisting condition.1 Apportionment of disability awards in workmen's compensation cаses between work related accidents and preexisting injuries or infirmities is provided for in §
*601"If the degree or duration of disability resulting from an accident is increased or prolonged because of a preexisting injury or infirmity, the employer shall be liable only for the disability that would have resulted from the аccident had the earlier injury or infirmity not existed."
Both the majority of the court below and the respondent in its brief to this Court relied on §
As Judge Wright pointed out in his dissenting opinion, Lewis's arteriosclerosis never affected his ability to work bеfore the heart attack. Since the attack, however, Lewis's physical activity has been limited because of the onset of severe рain. Although the pain is not caused by the infarction, the threshold at which the pain occurs is hastened by the attack and the scar on the heart сaused by the attack exacerbates the pain. Because of the early onset of the pain, Lewis is now 92% disabled. Whether or when the latеnt disease would have manifested itself without the injury does not appear in the evidence. Lewis v. The 4-E Corporation,
It is well settled that workmen's compensation is not limited tо those in perfect health. If the employment aggravated, accelerated, or combined with a latent disease or infirmity to producе disability, the preexisting disability does not disqualify the claim under the "arising out of employment" requirement of the statute. Southern Cotton Oil Co. v. Wynn,
It appears to us that the arteriosclerosis was aggravated and rendered symptomatic by the work related injury. Since Lewis's ability to work was unaffected by the arteriosclerosis prior to the accident, and there is no evidence in the record to indicate that the condition would have become symptomatic during the compensable period but for the injury, the Court of Civil Appeals' decision affirming the apportionment of the award for permanent disability betweеn the work related injury and the preexisting infirmity is in conflict with the decisions of this Court in Ingalls Shipbuilding and in Kroger, supra.
The decision of the Court of Civil Appeals is hereby reversed and the cаuse is remanded.
REVERSED AND REMANDED. *602
TORBERT, C.J., and MADDOX, JONES, ALMON, SHORES, EMBRY, BEATTY and ADAMS, JJ., concur.